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# OAR Box 

# 1778 Prepped by Ollie Stewart



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Number: 

# 43 ) ll-B-1 8 Docket Number: 

# A-90-0 6

Printed 10/28/2008 9:50:53 AM Sheet 43 of 276P. 2

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NOTE : Part s o f thi s ite mar e no t legible
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## 2T-B-/8

MEMORANDUM SUBJECT : FROM : 

## NO V 2 5 198 6 :•.•' ; inft l 

## lllj. , U ; 

## | j ^I ^ 1991 U * 1 1 

## E5^S_52--- S OH-IC F UI AI R ASI > RADIMIO N

Interpretatio n o f Reconstructio n (4 0 CF R 60.15 )
Divisio n
TO : Joh n B . Rasnic , Actin g Dire d

Stationar ySourc e Complianc e Offic e o f Ai r Qualit yPlannin g an d Standard s Jame s T . Wilburn , Chie f Ai r Complianc e Branc h Thi s i s i n respons e t o you r Septembe r 12 , 198 6 memorandum requestin g th e Stationar ySourc e Complianc e Division' s (SSCD's ) opinio n o f th e Florid a Electri c Powe r Coordinatin g Group' s (FCG's ) interpretatio n o f th e reconstructio n regulatio n a t 4 0 CF R 60.15 . FC G i s proposin g specifi c guidanc e o n th e item s t o b e include d i n th e fixe d capita l cos t o f fossil-fuel-fire d stea melectri c plants . Sectio n 60.1 5 o f th e Ne w Sourc e Performanc e Standard s (NSPS ) specifie s tha t reconstructio n occur s i f th e fixe d capita l cos t o f th e new component s exceed s 50 % o f th e fixe d capita l cos t o f a comparabl e entirel yne w facility , and i f i t i s technologicall y an d economicall yfeasibl e fo r th e facilit yt o compl ywit h th e applicabl e NSPS . A s cite d i n FCG' s summary , th e Decembe r 16 , 197 5 preambl e t o th e reconstructio n regulation s define s fixe d capita l cos t a s th e capita l neede d t o provid e al l th e depreciabl e components , includin g th e cost s o f engineering , purchas e an d installatio n o f majo r proces s equipment , contracto r fees , instru

mentation , auxiliar yfacilities , building s an d structures . Cost s associate d wit h th e purchas e an d installatio n o f ai r pollutio n contro l equipmen t ar e onl yinclude d i n th e fixe d capita l cos t t o th e exten t tha t the equipmen t i s require d a s par t o f th e manufacturing/operatin g process . Whe n determinin g reconstruc
tio n costs , car e shoul d b e exercise d t o includ e onl ythos e costs , associate d wit h th e reconstructe d affecte d facility
.P. 4

-2

- In makin g th e fina l determinatio n o f whethe r th e chang e i n questio n constitute s reconstruction , th e Administrato r wil l conside r al l technica l an d economi c limitation s th e facilit y mayhav e i n complyin g wit h NSPS . Point s t o b e considere d b y th e Administrato r ar e liste d a t §60.15(f) . FC G ha s propose d a lis t o f specifi c item s t o b e include d in th e reconstructio n cost s fo r fossil-fuel-fire d stea m electri c generatin g units
. Th e lis t i s compose d o f th e accountin g cate
gorie s provide d i n th e Federa l Energ yRegulator yCommissio n 1 8 CF R Par t 101 . SSC D an d th e Emissio n Standard s an d Engineerin g Divisio n hav e reviewe d thi s lis t an d hav e determine d tha t a substantia l numbe r o f th e item s ar e no t appropriat e fo r inclu

sio n i n th e cos t analysis
. Onl yth e cost s o f item s include d in , and activitie s associate d with , th e affecte d facilit yar e t o b e include d i n th e reconstructio n costs . Th e affecte d facilit yfo r fossil-fuel-fire d steamelectri c plant s consist s onl yo f th e stea mgeneratin g uni t a s define d a t 4 0 CF R 60.40 a an d §60.41a . Th e affecte d facilit yi s mor e specificall ydescribe d a t §60.41 a i n th e propose d standard s (Attachmen t A) , an d i n th e Jul y197 8 Backgroun d Informatio n Documen t (Attachmen t B) . Sectio n 60.41a(a ) o f th e propose d standard s fo r electri c utilit ystea mgeneratin g unit s elaborate s o n th e definitio n o f steamgeneratin g unit : ".. . Astea mgeneratin g uni t include s th e followin g systems : (1 ) Fue l combustio n syste m (includin g bunker , coa l pulverizer , crusher , stoker , an d fue l burners , a s applicable)
. (2 ) Combustio n ai r system . (3 ) Stea mgenerat
in g syste m

(firebox , boile r tubes , etc.) . (4 ) Draf t syste m (excludin g th e stack). " Th e affecte d facilit ythe n start s a t th e coa l bunkers , an d end s a t th e stac k breeching
. Th e unit s whic h constitut e th e affecte d facilit yma y bes t b e conveye d b yth e diagra m

i n Attachmen t C . A s th e diagra mindicates , th e followin g item s ar e include d i n th e affecte d facility : boiler s an d equipment , breeching , draf t equipment , lightin g systems , oil-burnin g equipment , pulverize d fue l equipment , stoke r o r equivalen t feedin g equipment , an d pressur e oi l systems . Th e followin g equipmen t woul d onl yb e include d i n reconstructio n cost s t o th e exten t tha t the ydirectl y servic e th e boiler : foundation s and structura l steel , buildings , as h handlin g equipmen t (generall yonl yth e discharg e valve s t o th e as h hopper) , boile r fee d wate r system , coa l handlin g an d storag e equipmen t (onl yth e coa l bunke r an d pulverizer) , instru

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# hTrvcH.-ut-.v T A TUESDAY , SEPTEMBE R19 , 197 8

PAR T V



# ENVIRONMENTA L PROTECTIO N AGENCY

ELEaRI C UTILIT

Y STEA M GENERATIN G UNIT

S Proposed Standard s o f Performanc e an d Announcemen t o f Publi c Hearin g o n Proposed

Standard sP. 6 

### /iTTACH/Vlb/V T r\

4217 4 Use e o f alternativ e methods , enfor cea-Urty . an d improvement ai n emis sio n contro l technology . Executiv e Orde r12044 . date d March 34 . 197S , whos e objectiv e to t o improv e Governmen tregt—_tfo_s , reyuife s ex ecutiv e branc h agencie s t o prepar e regulator y analyses ' fo rregn—ition s tin tma y hav e majo reconomi c conse quence- . Th e proose d standard s mee t th e criteri afar-preparatio n o f a regu lator y analysi s a s outline d In th e Executive order . Therefore , a regulator y analysi s tuts bee n prepare d a s re quired . Th e analysi s l acontaine d i n th e harhgro.-- i ___tn__-__- , document s fo rth e propose d standards . Th e regulator y analysto to no tbein g pob * Usbe d a s a separat e docu-ieu tbecaus e th e wor k wa s begu n befor e tb e Presl dent's Executiv e orde rwa s published . However , i n orde rto* presen ta bette r understandin g o f

tb e analyses ' conr

taine d I n th e backgroun d Informatio n documents , a summar y o f th e analyse s i s include d I n th e preamble . Th e sum mar y >*f«~-«gg

ai n detai l th e aftera_r ffvng - nnr\o.iA*ry*A Sectio n 31 7 o f

th e dea n Afa

rAc tre quire s th e Adn___Etratart o prepar e a n -ton s deten-ine d b y th e . to-b e nihstairfh. 1 Th e determine d tha tth e

men s an d ____de d th e i i n theb_cfegre*—_

d Dated : Septembe rIL , 1878a . DOOU_-__ . I tto propose d tha t4 9 CF RPar tW b e amende d b y revisin g th e headin g an d {60.4 0 o f

Subpar tO . b y addin g a ne w Subpar tDa . b y _____ _a ne w ref

erenc e mp-ior f

t o flpprnriiT A . an d b y reservin g Appendi x Ba afollnwi . L Th e headin s forP-lniM . E > l are vise d t o rea d a afo-ma u

40.4 0 i a SB-ende d b y .p_(aX3)asfbI]ow K _«M » Apfiic-k-ir

/ MM I
f J)l ano tsubjec tt o th e piovfeluu s o f Subpar tDa . (Sec . III . 301'a

) o f th e Oea n Ai

rAc ta a amende * (4 2 UJB.C. 7111. 7_nca) « MAE S

Se c _ 99.40 s Appffcsbflrt

r&n d cfesignstio n o

f —ffecte d rac-tty . 60.41 aDefinitions . 60.42 aStandar d lo rparticulat e matter . 60.43 aSUndantferautfurdfoxide . 60.44 aStandar d fo rnitroge n oxides . 09.45 aCo—imer——

1 demonstratio n permit . 90.4o

_ CaWmiaifti—ai

- provisio—s. SS4T aItertBsfa

m monitoring . M.4- S Co-Lpnanee drtern-natio n Bfeporting Kt)u_-_a__a . : See. 111 . ao.4S a Amauasii . See . 111 . 301(a > oTth e Clea n A_- __t*_ s aroe-tte d (4 9 DA C 74X1 , MOlta)) . an d -__-r-_ . a-UMrity a s note d below . mwLW^LWf

D#* M 5tQflA_VV I O rrvrfOflMHlC e fO f EPKtrl c tffltW y Stao m wonoFVrw

f (ftirt s re v h Cammanw* Mat

SayI * 197 0 ItadOky. fa rTh e affecte d facilit y t o whic h thi s subpart , applie s i s eac h electri c otfltt y stea m generatin g unit : CZ ) Which . Is T-M - o f

rnmhimtfng •tor e than'7 3 meg—watt s (—5 0 m_lio n Btu/hour ) bea tInpu to f _-__ . fue l Cefthe ralon e o ri n combinatio n wit h an y othe rfuel X an d _U > Fo rwhic h construction o rmodi r fi-a-toai aconanrnce d afte rSeptem be r18.1.78 . (b ) Thi s subpar tappUeat o -teetri e sti-t y combine d cycl e ga a turbine s tha tar e capabl e o

_cnmrn_ttn « mor e tha n 7 3 _-M»i.. u (36 0 mi-te n Btu / hour ) heaf

e inpu to f

loss - fue l i n th e stea m generator . Onl y emission s re sultin g fro m comhustto n o f fossi l fue l &

_th e stea m generato rar e subjec tt o thi s subpart . (Th e ga s turbin e emis MD-Jectt o Subpar tGO. )

X Ane w D ai s adde d a aicrt - ,C_41

_ JLs use d i n thi s subpart , al l term s no t define d herei n shal l hav e th e meanin g give n the m i n th e Ac tan d to subpar t A o x U—Spart

. fa ) "Stea m generating ' unit " mean s an y ftimace, boiler , o rothe rdevic e use d fo rcombustin g fue l fo rth e pur pos e o f producin g stea m (includin g fossi l ftrel-fire d stea m generator s asso ciate d wit h combine d cycl e ga s tur bines ; nuclea rstea m generator s ar e no tIncluded) . A stea m generatin g uni t tnrlui- . th e followin g systema ; (I ) Fue l combu.si.ion syste m (Includ in g bunker , coa l pulverizer , crusher , stoker , an d fue l burners , a s applica ble) , t_ > Combustio n ai rsystem . <3 > Stea m generatin g syste m (fire box , boile rtubes , etc) . (4 ) Draf

tsyste m (excludin g th e (b ) "Electri c utflity stea m generatin g unit " mean s an y stea m electri c gener atin g uni ttha ti s constructe d fo rth e purpos e o f

supplying mor e tha n one thir d o f it s maximu m desig n electrica l outpu tcapacit y t o a n electrica l distri butio n syste m fo rsale . An y stea m dis tributio n syste m tha ti s constructe d fo rth e purpos e o f

providin g stea m t o asteam-electri c generato rtha twoul d produc e electrica l energ y fo rsal e i s als o considere d ti n determinin g th e electrica l energ y outpu tcapacit y of th e affecte d facility . (c ) "Fossi l fuel " mean s natura l gas , petroleum , coal , an d an y form o f solid , -quid , o rgaseou s fue l derive d fro m suc h materia l fo rth e purpos e o f creat in g usefu l heat . (d ) '"Subbituminou s coal " mean s coa l tha ti s classifie d a s subbituminou s A . B , o rC accordin g t o th e America n So ciet y o f

Testin g an d Materials ' (ASTM ) Standar d Specificatio n fo r Oa-rifVatto n o f

Coal s b y Ran k D388 - 00 . (e ) -lignite - mean s coa l tha tto clas sifie d a s lignit e A o rB accordin g t o th e America n Societ y o f Testin g an d Materials * (ASTM ) Standar d Specifi catio n fo rClassificatio n o f Coal s b y Ran k D3SS-00 . (f ) "Coal refuse " mean s wast e prod uct s fro m coa l mining , physica l coa l cleaning , an d coa l refinin g operation s (e.g . calm , gob , o rothe rrejects ) con tainin g coal , ash

rmatri x material , clay , an d organi c an d inorgani c material . (g ) "Potentia l combustio n concentra tion " mean s th e theoretica l emission s (ng/J , lb/millfo n Btn ) tha twoul d

. resul tfro m comb—stion o f a fue l i n a n u—Cleane d stat e (withou temissio n con tro l systems ) and : ( 1 > Fo rparticulat e matte r— c (i ) 3.00 0 ng/ J hea tinpu t(7. 0 Ib/mfl Ho n Btu ) fo rsoli d fuel ; an d (I D 7 5 ng/ J hea tinpu t(0.1 T Ib/tnil Bo n Btu ) fo rliqui d fuels .

- (2 ) Fo rsulfu rdioxid e I s determine d trade r8 0O.48a(b) . (3 ) Fo rnitroge n oxide s is : (1 ) 29 0 ng/ J hea tinpu t(0.0 7 !_/___ - lio n Btu ) fo rgaseou s fuels ; (ti ) 31 0 ng/ J hea tInpu t(0.7 3 lb/mfl llo n Btu ) fo rliqui d fuels , an d (ill ) 99 0 ng/ J hea tinpu t(3. 3 lb/mil lio n Btu ) fo rsoli d fuels . U- > "O-nbtne d cycl e ga s turbine " mean s s stationar y ga s tnr__s e syste m wher e hea ti s recovere d fro m th e ex haus tgase s b y passin g th e ernati- t gase s throug h astea m generatin g unit , fossi l fue l ma y als o b e combuste d i n th e stea m generatin g unit . (i ) "Utilit y company " mean s th e larges torganization , bust-em , o rgov ernmenta l entit y tha town s th e affect e d facult y (e.g . a holdin g compan y wit h operatin g subsidiar y companies) . <J ) "Syste m capacity* * mean s th e su m o f th e rate d electrica l outpu tca pacit y o f al l electri c generatin g etjutp VO - *X MO . MS—TK-DAT

, S E \9, W7

tP. 7

?r\ T-TV* . Environn:•„•;••:_ I Protectio n Ager.c y Offic e o f Ai rQualit y Plannin g an d Standard s Researc h Triangl e Par k N C 277 1 1 Ai r •-ePA-45O/2-73-O05 a Jul y197 3 

### ATTAC H V*EUT" B 

# Stea m Generatin g Unit s .-g^---B2_ . 

# Backgroun d Informatio n fo r Propose d NO x Emissio n Standard s'•&?"

MODIFICATIO N

AND RECONSTRUCTIO N P. 8

5. 1 GENERAL Th e terms modificatio nan dreconstructio nhav e specia l meaning s whe nuse di

nnew sourc e performanc e standards . Thes e term s ar e clarifie d inSubpar t A , Par t 60 , Subchapte r C , Chapte r 1 , Titl e 40 , Cod e o f Federa l Regulations . I ngenera l terms , a modificatio ni s a selecte d typ e o f chang e whic hincrease s th e emissio no f selecte dpollutant s t o the atmosphere . Whe nthe alteration s ar e limited , ne w sourc e performanc e standard s onl y

requir e tha t increase s i nthe emissio no f selecte d pollutant s be prevented . Ingenera l terms , reconstructio ni s a chang e whic hi s s o substantia l a s t o clas s th e sourc e a s a ne w sourc e rathe r thana naltere dexistin g source . I nthi s case , the sourc e become s subjec t t o al l th e limit s o f th e ne w sourc e performanc e standard . 5. 2 MODIFICATIO N 5.2. 1 Scop e andEffec t o f Modiftatio nRegulation s A modificatio nmean s an y chang e i nth e metho do f operatio no f an existin g facilit y

whic hincrease s the amoun t o f an y ai r pollutan t (t o whic ha standar dapplies ) emitte dint o th e atmospher e b y tha t facility "
o r whic hresult s i nthe emissio no f any ai r ndllutan t (t o whic ha standard , applies ) int o the atmospher e no t oreviousty"emitted . Th e ter m ^" ^ modificatio ni s furthe r limite db y exemptin g selecte dtype s o f change s

5- 1M l i. i

! i i fro

m th e aDDlicabilit y

o f new sourc e Derformanc e standards . Normally , al l tha t i s require do f a nexistin g facilit y

i s tha t emission s o f a specifi c pollutan t afte r alteratio nbe no mor e tha nthe y wer e befor e alteration . Thes e modificatio nregulation s onl y appl y to th e pollutant s o f th e new sourc e standar dandappl y o na pollutant-by pollutan t basis . I nrar e cases , emissio no f on e o r mor e pollutant s ma y b e les s tha nth e limi t o f a new sourc e performanc e standar dprio r t o th e alteration . I

nthi s situation , a

nemissio nincreas e i s allowed , u p th e limi t o f th e applicabl e ne w sourc e performanc e standard . Consequently , whe nchange s ar e mad e whic hcaus e anexistin g sourc e t o becom e subjec t t o a new sourc e performanc e standard , emissio ncontro l system s ar e normall y altere dt o preven t emissio nincreases . I nexceptiona l circumstanc e
n o additiona l ai r pollutio ncontro l equipmen t ma y b e neede dt o preven t
a nemissio nincreas e or ; limitin g emission s t o th e leve l o f th e new sourc e performanc e standar dma y be les s costl y

tha npreventin g an emissio nincrease . Addin g a naffecte dfacilit y t o a plan t o r replacin g a nexistin g facilit y withi na Dlan t woul dno t caus e othe r unchange dexistin g facilitie s withi nth e plan t t o becom e subjec t t o th e no emissio nincreas e rule . Wher e a plan t ha s severa l existin g facilities , th e n o emissio nincreas e rul e ma y no t appl y

t o a naltere dexistin g facilit y i f ne t plan t emission s ar e no t increased . Fo r example , i f emission s o f pollutan t A ar e increase d b y a chang e t o facilit y 1 i na plant , thi s emissio nincreas e i s allowe d i f emission s o f pollutan t A fro m facilit y

2 ar e decrease db

y a namoun t ___£ua... r tp..or..-exceedinq.^.th

e ..amoun t of , jn.crease " from

fac i 1 ity'/T."""" . .Emissio nincrease s ar e allowe di f suc hincrease s ar e cause db y routin e maintenance , repair , and replacement . Emissio nincrease s ar e als o allowe di f cause db y increase s in productio nrat e whic hca n b e accomplishe dwithou t majo r capita l expenditure . Increase s in emission s cause db y longe r operatin g hour s ar e als o exempte dfro m th e rul e o n no emissio nincrease . Anothe r exemptio ni s fo r th e us e o f a n alternativ e fue l o r ra

w materia l if—prio r t o th e dat e an y standar dbecome s applicable — th e existin g facilit y wa s designe dt o accommodat e tha t alternativ e use . Conversio nt o coa l a s stipulate di n Sectio n111(a)(3 ) o f th e Clea nAi r Amendment s o f 197 7 i s no t considere da modification . Emissio nincrease s cause db y th e additio no r us e o f any system whos e primar y

functio ni s th e reductio no f ai r pollutants , ar e als o exemp t from th e n o emissio n increas e rule . 5.2. 2 Modifie dPulverize dCoal-Fire dSteam Generator s Fo r th e purpose s o f determinin g i f modificatio nregulation s appl y o r shoul dapply , th e pulverize dcoal-fire dsteam generato r system

i s define da s includin g th e followin g majo r components . a ) pulverize r system b ) combustio nai r system c ) steam

generatio nsystem d ) draf t syste m •_-zz-^) 'fue l : i^_irctit)TFsystem Th e majo r point s whic hdefin e th e inlet s t o th e affecte dfacilit y are : ._._--,•_.• . - .-._.

_.v . -. . ,-.,-. - .,_-,..-_,-,-

•

5- 3I l l I . 

# li; ;
rj . ;r ! it ? i

i\\\ 

# I?! :

!"l | •fr a

ii ; 1 . Th e inle t t o th e pump s whic hfee dwate r a. t _te= m generato r pressure . 2 . Th e inle t t o th e bin s whic hdirectl y fee dtr.e

Dulverize do r stoke r system s unles s th e bin s ar e size dt o stor e mor e tha neno coa l t o operat e th e stea m generato r 7 2 hour* - a t ful l load . Whe r larg e bin s ar e installed , th e inle t t o th e c-fecte dfacilit y i s outle t o f th e bin s feedin g th e pulverize r : r stoke r systems . 3 . Th e combustio nai r intakes . Th e majo rpoint s whic h defin e th e outlet s o f th e affecte d facilit ye 1 . An y stea m outle t 2 . An y botto m as houtle t 3 . Th e outle t o f th e las t system installe dbefor e th e stack , suc h
a s th e outle t o f any

induce ddraf t fan . Al l component s o f th e stea m generato r installe dbetwee nthes e point s ar e par t o f th e affecte dfacilit y excep t an

y ai r pollutio ncontro l systems , s i
a s electrostati c precipitators , mechanica l collectors , baghouses , o r scrubbers . Replacemen t o f th e pulverize r system wit ha simila r system o r replacemen t o f componen t part s o f th e pulverize r syste m wit hsimila r part s woul drie

t b e eorisi_ere

_ a modif!«_'source . However , replacemen t
o r redesig no f th e pulverize r system whic hwoul dsubstantiall y chang e

ML.--

ail M i I * r ,l ! 

### 5- 4P.1 2



### th e ph.ys.ica l characteristic s o f the pulverize dcoa l ma y be a chang e wher e modificatio nregulation s apply . Likewis e change s inthe desig no f th e combustio nai r syste m whic hchang e the wa y

combustio nai r i s introduce dt o th e combustio n chambe r woul dcaus e a sourc e t o be evaluate dt o determin e i f modificatio nregulation s shoul dapply . Changin g th e combustio nai r dampe r setting s i s no t a modificatio na s lon g a s no redesig no f the combustio nai r system

i s involved . Th e steam generatio nsystem

include s th e feedwate r treatmen t system , watertubes , economizer , an dsuperhea t an

drehea t sections . Maintenanc e o f thes e component s i s no t a modification . Majo r redesig n o f thes e part s woul dcaus e a sourc e t o b e evaluate dt o determin e i f modificatio nregulation s shoul dapply . T t i s doubtfu l tha t redesig n o f th e feedwate r treatmen t system , th e economizer , o r th e superhea t o r rehea t section s woul daffec t NO ' emissions . Redesig no f th e steam generatio nsyste m

component s whic haffec t combustio ntemperatures suc ha s the waterwal l sections—coul dchang e N0 Y

### emissio ncharacteristics . Redesig no f th e draf t syste m suc ha s changin g fro

m induce ddraf t condition s t o pressurize dfirin g condition s woul dcaus e a sourc e t o b e evaluate dt o determin e i f modificatio nregulation s shoul dapply . Change s inth e fue l combustio nsystem which , woul db e modification s are :
a ) change s inthe numbe r o f burner s b ) change s i nth e typ e o f burner s ..___ iiil 

### , siiB 

### -. 5 

### ;. 4 

### . _ •__^:>and_i^;_j:il_ngeV : 

### fn' : 

### th e locatio no f burners .

_i^__r:r_ iI !!.! •

•! 1 Althoua ha chang e t o a differen t nitroge nconten t o r a differen t

moistur e conten t coa l o r a switc hfro m lignit e t o non-lignit e coa l migh t be considere da modification , thes e change s ar e exempte dfro m modificatio nevaluatio nb y curren t regulations . Sources , whic hb

y reaso no f th e dat e o f ne w construction , ar e subjec t t o th e N

O ne w sourc e performanc e standar dfo r coa l combustio n A continu e t o be subjec t t o the origina l standar dinspit e o f an y subsequen t change s insoli dfossi l fuel s o r alteration . I ncase s wher e th e origina l N O standar di s revise dt o become mor e restrictive , non e o f th e foregoin g discusse dmodification s shoul dcaus e the sourc e regulate db y th e origina l NO standar dt o become subjec t t o th e mor e restrictiv e standar dunles s th e modification s ar e s o extensiv e a s t o be classe da s reconstruction . (Se e Sectio n5.3) . 5.2. 3 Modificatio no f Oil - o r Gas-Fire dStea m Generator s t o Fir e Coa l Th e discussio no f Sectio n5.2. 3 i s limite dt o modification s whic h woul dcaus e a sourc e t o become subjec t t o N O new sourc e performanc e standar dmodificatio nregulation s fo r larg e pulverize dcoa l (othe r tha n lignite)-fire dstea

m generators . Alteration s whic hmigh t caus e anexistin g oi l o r gas-fire dstea m generato r t o become subjec t t o N O modificatio nregulation s fo r coal A fire dstea

m generator s ar e alteration s involvin g a switc hfro m ga s o r oi l t o coal . Curren t regulation s provid e tha t i f th e oi l o r gas-fire d :^sourc e i s.

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idesn ' gned-t o f ire^coah - --switcf r t o coal^doe s mt^~-
caus e th e sourc e t o becom e subjec t t o coal-fire dsteam generato r N

O modificatio nregulations . I naddition , Sectio n111(a)(8 ) o f th e Clea n

iiiO-lTre-t. i or i nr f Ton s

5- 6. i I

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## ,. ( ; 

## n n I'll: . sourc e (se e Sectio n5.3) . Ruling s o

nwhethe r alteration s o f fossi l fuel-fire dstea m generator s constitut e a modificatio nca nb e obtaine db

y contactin g a Ll . S . Environ menta l Protectio nAgenc y Regiona l Offic e o f Enforcement . 5. 3 RECONSTRUCTIO N Th e purpos e o f reconstructio nregulation s i s t o preven t the perpetuatio no f existin g sources . Whe nmodification s o r replacement s become s o extensiv e a s t o creat e a nessentiall y

ne w source , th e sourc e become s a reconstructe dsourc e an d i s subjec t t o the ne w sourc e per formanc e standard s whic haopl y a t the time o f initiatio no f reconstruction . Accordin g t o th e provision s o f Subpar t A , Par t 60 , Subchapte r C , Chapte r 1 , Titl e 40 , Cod e o f Federa l Regulations , a facilit y become s a reconstructe dsourc e irrespectiv e o f an y chang e i nemissio nrat e whe n
a ) th e fixe dcapita l cos t o f the new component s exceed s 5 0 percen t o f th e fixe dcapita l cos t tha t woul dbe require dt o construc t a comparabl e entirel y new facilit y

an d b ) i t i s technologicall y an d economicall y

feasibl e t o mee t applicabl e standards . Ruling s o nwhethe r change s t o a fossi l fuel-fire dstea m generato r constitut e reconstructio ncanb e obtaine db y contactin g a U . S . Environ menta l Protectio nAgenc y Regiona l Offic e o f Enforcement .

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